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Finding the Fourth Proportional to 287,053.76, 430,598.79 and 87,388.76

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Solution

The fourth proportional to 287,053.76, 430,598.79 and 87,388.76 is: 131,088.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,053.76 : 430,598.79 = 87,388.76 : x
  2. Step 2: Convert to fraction form
    287,053.76/430,598.79 = 87,388.76/x
  3. Step 3: Cross multiply
    287,053.76x = 430,598.79 × 87,388.76
  4. Step 4: Simplify right side
    287,053.76x = 37,629,492,162.61
  5. Step 5: Solve for x
    x = 37,629,492,162.61/287,053.76
  6. Step 6: Final answer
    x = 131,088.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.